Make a really good BLT

[pgporada]

That is, a Boulder Load Tester 😋 . It should scale up to 200% of production traffic, but that may be a deployment function. We'll want a flag that performs all issuance steps except it doesn't hit /acme/finalize. @jcjones

[mcpherrinm]

I think we should consider writing our tests inside a test framework like https://k6.io/, which will let us easily iterate on multiple load tests (eg, hitting gRPC or HTTP APIs)